/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Public/VoiceInterfaceImpl.h
Determines whether a remote talker is currently talking or not
true if the user is talking, false otherwise
virtual bool IsRemotePlayerTalking ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & UniqueId )